Caffeine - Wikipedia
...The most common sources of caffeine for human consumption are the tea leaves of the Camellia sinensis plant and the coffee bean, the seed of the Coffea plant. Some people drink beverages containing caffeine to relieve or prevent drowsiness and to improve cognitive performance....
https://en.wikipedia.org/wiki/Caffeine
How caffeine affects your body - Bupa UK
...Caffeine is found naturally in around 60 different plants, including coffee beans, tea leaves and cacao beans (which are used to make chocolate). Caffeine acts as a stimulant, which means it increases the activity of your brain and central nervous system....
https://www.bupa.co.uk/newsroom/ourviews/how-caffeine-affects-body
How much caffeine is too much? - BHF
...Our expert answers a question about how much caffeine you should have as part of a heart-healthy diet....
https://www.bhf.org.uk/informationsupport/heart-matters-magazine/nutrition/ask-the-expert/how-much-caffeine
What Is Caffeine, and Is It Good or Bad for Health?
...Caffeine is a natural stimulant consumed throughout the world. This article reviews caffeine and its health effects, both good and bad....
https://www.healthline.com/nutrition/what-is-caffeine
What happens when you take too much caffeine - BBC Future
...While there's a vast number of studies showing that some caffeinated drinks have health benefits, there's still some uncertainty around how we should be consuming it. There are many crucial......
https://www.bbc.co.uk/future/article/20240605-what-happens-if-you-take-too-much-caffeine-and-how-much-is-too-much
Caffeine | Stimulant, Health Benefits, Addiction | Britannica
...Caffeine, nitrogenous organic compound of the alkaloid group, substances that have marked physiological effects. Caffeine occurs in tea, coffee, guarana, maté, kola nuts, and cacao....
https://www.britannica.com/science/caffeine
Caffeine: What It Is, Benefits and Side Effects
...What is caffeine? Caffeine is a type of drug called a stimulant, meaning it increases chemicals in your brain called neurotransmitters....
https://health.clevelandclinic.org/caffeine
Caffeine - The Nutrition Source
...Although we tend to associate caffeine most often with coffee or tea, the research below focuses mainly on the health effects of caffeine itself. Visit our features on coffee, tea, and energy drinks for more health information related to those beverages....
https://nutritionsource.hsph.harvard.edu/caffeine/
How much caffeine should I drink? - BBC Good Food
...Get the facts about caffeine ? Registered Nutritionist Jo Lewin explains the side effects, health benefits and guidelines, plus get tips for cutting down your intake...
https://www.bbcgoodfood.com/health/nutrition/spotlight-caffeine
Caffeine: Benefits, Uses, Dosage, and Side Effects - EvidenceLive
...Caffeine is a stimulant compound that affects the central nervous system. It contains substances that change how the brain and body work, with some beneficial effects and others that may become potentially dangerous....
https://evidencelive.org/caffeine-benefits/